Storage

Protecting Against Rare Event Failures in Archival Systems

Download Now Free registration required

Executive Summary

Digital archives are growing rapidly, necessitating stronger reliability measures than RAID to avoid data loss from device failure. Mirroring, a popular solution, is too expensive over time. The authors present a compromise solution that uses multi-level redundancy coding to reduce the probability of data loss from multiple simultaneous device failures. This approach handles small-scale failures of one or two devices efficiently while still allowing the system to survive rare-event, larger-scale failures of four or more devices.

  • Format: PDF
  • Size: 548.2 KB